国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

In recent years, the military of our country starts to carry out structural reforms on maintainability supporting system from three-level to two-level. The maintainability of weapons and equipments is the key to carry out the Two-level Maintenance System Transformation, so it is necessary to conduct maintainability verification test in the stage of finalization of production. In order to improve and perfect the maintainability verification test method to meet the needs of Two-level Maintenance System Transformation, this thesis summarizes the opportunity, content, method and procedure of maintainability of weapons and equipments. And bases on the method characteristic of maintainability of weapons and equipments, this thesis emphatically induces and concludes the research status of three aspects in maintainability verification test, respectively are selection of test methods, sample size estimation and distribution, and fault simulation. Based on the research of three aspects, the problems exist in maintainability verification test was analysed, and simultaneously further research was prospected.